Bitcoin and Nostr software
Safer signing and dependable infrastructure for open protocols
threenine.io builds software that keeps your Nostr identity in your hands, and relay and backend infrastructure that builders can understand and run.
Open protocols only help when people can use and operate them without giving control away again.
Nostr and Bitcoin create different defaults for identity, publishing, payments and infrastructure. We focus on the product work that makes those defaults practical: safer signing, clearer trust boundaries and backend systems that operators can understand.
Product focus
- Nostr identity and signing workflows that keep private keys closer to the user.
- Approval flows that make signing requests understandable before an event is produced.
- Nostr relay, storage and backend-service infrastructure for builders and operators.
- Specialist engineering support for teams building aligned Bitcoin and Nostr products.
Diogel
Keep your Nostr identity in your hands.
Diogel keeps your digital identity safely in your hands, so no platform can take it from you. Porwr protects it in your browser, Symudol on your phone and Bancwr on a server you run.
Porwr, in your browser
Use Nostr web apps that support NIP-07 without handing over your identity. For Chrome and Firefox.
Symudol, on your phone
Carry your Nostr identity on your phone, under your control. For Android.
Bancwr, on your own server
Keep your brand's Nostr identity under your control, on a server you run, with roles and a signing log. In development, with no stable release yet.
Yours, not ours
Porwr is open source and every Diogel repository is public. No analytics, and Diogel never holds your identity.
Diogel
Porwr, Symudol and Bancwr
Relay and backend foundations for Nostr builders.
Nostrfi covers relays, storage, backend services and operator workflows. We are building the relay first, and will offer hosted services only when the product and the way we run it are ready.
Explore NostrfiRelay operations
Event storage, subscriptions, retention choices, policy and moderation need clear operating boundaries.
Backend services
Nostr products need protocol-aware backend systems that can be monitored, documented and maintained.
Observability
Operational visibility turns infrastructure from a hidden liability into a manageable product surface.
Operator clarity
Deployment choices, protocol assumptions and reliability limits should be explicit before scaling.
Two product suites for Nostr.
Diogel keeps your identity safe when you sign. Nostrfi is building the relays and backend services Nostr apps depend on.
How to Choose Nostr Relays
Learn how to choose Nostr relays without guesswork. This guide covers privacy, reliability, search support, relay quality, and what to avoid.
Nostr Relays, Privacy, and Security
Understand the privacy and security trade-offs of Nostr relays, including what relay operators can observe, what they cannot do, and how to use relays more safely.
What is a Nostr Relay?
Learn what a Nostr relay is, how relays work, and why they matter for privacy, censorship resistance, availability, and everyday use on Nostr.
Why Nostr keys and identity are better for privacy
Nostr replaces account recovery, phone-number signups, and centrally managed identities with cryptographic keys. That changes privacy, but it also shifts responsibility onto the user.
Best Nostr Browser Extensions (2026): Complete Comparison
Compare the best Nostr browser extensions of 2026. We review Porwr by Diogel, Alby, Nos2x, and Nsec.app to help you choose the right NIP-07 signer for secure key management.
Product design & development
We design and build Nostr and Bitcoin products for teams, drawing on the products we ship ourselves.
Nostr product engineering
Focused engineering support for teams building signers, browser extensions, relays, backend services and protocol-aware product experiences.
Bitcoin product engineering
Bitcoin-native and Bitcoin-aligned product work shaped around payments, ownership, privacy and user control.
Our mission
We help people take control of their money, their data and their digital lives. We teach how sovereignty works, build the tools that make it practical, and stay alongside the people who use them.